BS 1387:1985 - Thai Premium Pipe · 2019. 2. 21. · BS 1387:1985 Screwed and Socketed Steel Tubes...

BS 1387:1985 Screwed and Socketed Steel Tubes and Tubular and for Plain End Steel Tubes Suitable for Welding

MATERIALOF

GRADE

CHEMICAL COMPOSITION (%) MECHANICAL PROPERTIES

CMax

SiMax

MnMax

PMax

SMax

YieldStrength

TensileStrength Elongation

N/mm2 N/mm2 % (min.)- 0.20 - 1.20 0.045 0.045 195 320-460 20

Light class

NOMINAL SIZE THICKNESSMMOUTSIDE

DIAMETERMM

WEIGHT(PLAIN END)

KG/M

CROSS SECTIONAL

AREA

GEOMETRICALMOMENT OF

INERTIAMODULUS

OF SECTIONRADIUS OFGYRATION

in mm Std. Min Min Max STD cm2 cm4 cm3 cm

1/2" 15 2.0 1.84 21.0 21.4 0.947 1.200 0.580 0.54 0.703/4" 20 2.3 2.12 26.4 26.9 1.380 1.840 1.357 1.01 0.861" 25 2.6 2.39 33.2 33.8 1.980 2.548 3.124 1.85 1.11

1¼" 32 2.6 2.39 41.9 42.5 2.540 3.341 6.516 3.07 1.401½" 40 2.9 2.67 47.8 48.4 3.230 4.205 10.775 4.45 1.602" 50 2.9 2.67 59.6 60.2 4.080 5.365 21.489 7.14 2.00

2½" 65 3.2 2.94 75.2 76.0 5.710 7.392 48.598 12.79 2.563" 80 3.2 2.94 87.9 88.7 6.720 8.768 78.685 17.74 3.004" 100 3.6 3.31 113.0 113.9 9.750 12.744 189.988 33.36 3.86

Medium class

NOMINAL SIZE THICKNESSMMOUTSIDE

DIAMETERMM

WEIGHT(PLAIN END)

KG/M

CROSS SECTIONAL

AREA

GEOMETRICALMOMENT OF

INERTIAMODULUS

OF SECTIONRADIUS OFGYRATION

in mm Std. Min Min Max STD cm2 cm4 cm3 cm

1/2" 15 2.6 2.34 21.1 21.7 1.210 1.534 0.725 0.67 0.693/4" 20 2.6 2.34 26.6 27.2 1.560 2.054 1.538 1.13 0.871" 25 3.2 2.88 33.4 34.2 2.410 3.184 3.785 2.21 1.09

1¼" 32 3.2 2.88 42.1 42.9 3.100 4.080 7.917 3.69 1.391½" 40 3.2 2.88 48.0 48.8 3.570 4.640 11.979 4.91 1.612" 50 3.6 3.24 59.8 60.8 5.030 6.516 26.573 8.74 2.02

2½" 65 3.6 3.24 75.4 76.6 6.430 8.280 55.152 14.40 2.583" 80 4.0 3.60 88.1 89.5 8.370 10.720 98.433 22.00 3.034" 100 4.5 4.05 113.3 114.9 12.200 15.750 238.273 41.47 3.895" 125 5.0 4.50 138.7 140.6 16.600 21.650 490.426 69.76 4.766" 150 5.0 4.50 164.1 166.1 19.700 25.450 822.071 98.99 5.68

Color MarkingClass Color

Light BrownMedium BlueHeavy Red

Dimension Tolerances

Thickness Light tube ( L ) : - 8 %Medium ( M ) and Heavy tube ( H ) : - 10 %

Weight +10% ,-8 %

Hydrostatic Test 50 bar or 700 psi.

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NOMINAL SIZE THICKNESSMMOUTSIDE

DIAMETERMM

WEIGHT(PLAIN END)

KG/M

CROSS SECTIONAL

AREA

GEOMETRICALMOMENT OF

INERTIAMODULUS

OF SECTIONRADIUS OFGYRATION

in mm Std. Min Min Max STD cm2 cm4 cm3 cm

1/2" 15 3.2 2.88 21.1 21.7 1.440 1.856 0.820 0.76 0.663/4" 20 3.2 2.88 26.6 27.2 1.870 2.496 1.769 1.30 0.841" 25 4.0 3.60 33.4 34.2 2.940 3.920 4.404 2.58 1.06

1¼" 32 4.0 3.60 42.1 42.9 3.800 5.000 9.348 4.36 1.371½" 40 4.0 3.60 48.0 48.8 4.380 5.720 14.242 5.84 1.58

2" 50 4.5 4.05 59.8 60.8 6.190 8.100 31.750 10.44 1.982½" 65 4.5 4.05 75.4 76.6 7.930 10.350 66.518 17.37 2.543" 80 5.0 4.50 88.1 89.5 10.300 13.400 118.930 26.58 2.984" 100 5.4 4.86 113.3 114.9 14.500 18.684 279.207 48.60 3.875" 125 5.4 4.86 138.7 140.6 17.900 23.382 525.111 74.70 4.746" 150 5.4 4.86 164.1 166.1 21.300 27.486 881.386 106.13 5.66

Color MarkingClass Color

Light BrownMedium BlueHeavy Red

Dimension Tolerances

Thickness Light tube ( L ) : - 8 %Medium ( M ) and Heavy tube ( H ) : - 10 %

Weight +10% ,-8 %

Hydrostatic Test 50 bar or 700 psi.

Heavy class

BS 1387:1985

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